DISSECTION OF A WlNTKll liUD 

 B. Remove the scales in pairs, arranging them thus : 



49 



How many pairs are found ? 



As the scales are removed observe whether the sticky coat- 

 ing is thicker on the outside or the inside of each scale, and 

 whether it is equally abundant on all the successive pairs. 

 What do you suppose to be the probable use of this coating ? 

 Note the delicate veining of some of the scales as seen 

 through the magnifying glass. What does this mean ? 

 Inside the innermost pair are found two forked, woolly 

 objects. What are these? Their shape could be more 

 readily observed if the woolly coating were removed. Can 

 you suggest a use for the woolly coating ? 

 C. Examine a terminal bud in the same way in which you 

 have just studied the lateral bud. It may contain parts 

 not found in tlie other. What is the appearance of these 

 parts ? What do they represent ? If there is any doubt 

 about their nature, study them further on a horse-chestnut 

 tree during and immediately after the process of leahng 

 out in spring, or let the twigs remain in water for a few 

 weeks until the buds open. 



